Chelsea have condemned any threats that have been made against referee Tom Henning Ovrebo following his performance in the Champions League semi-final against Barcelona.
It's been reported in London that internet death threats had been made against the Norwegian official and that he had been "smuggled out of the country" under police escort and advised to change hotels.
The Premier League club says if it had proper evidence it would take the strongest action against any season ticket holders or members involved.
Chelsea fans were upset Ovrebo did not award their side a penalty, despite several strong appeals, during the 1-1 draw at Stamford Bridge that sent Barcelona into the final on the away goals rule.
Several players, notably striker Didier Drogba, remonstrated furiously with the referee after the tie, which was settled by Andres Iniesta's stoppage-time goal.
